Cameta Digital Photo Lab

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With a focal length of 20mm and a f/1.4 aperture, the Sigma 20mm f/1.4 Art DG HSM Lens delivers outstanding large-aperture brightness and bokeh, delivering unprecedented visual experiences. Allowing the photographer to leverage the perspective provided by the wide -angle and the shallow depth of field provided by the large aperture, this lens is ideal not only for such ultra-wide-angle subjects as landscapes and starry skies, but also for snapshots in low light, indoor photography, portraits with a natural bokeh effect, and much more. Sigma has extensive experience in leveraging its advanced design capabilities and leading-edge technologies to craft large-aperture prime lenses that bring out the full potential of ultra-high-megapixel DSLRs.

Two aspherical glass elements minimize distortion throughout the entire image. It features two FLD ("F" Low Dispersion) glass and five SLD (Special Low Dispersion) glass elements to minimize transverse chromatic aberration, which is mainly visible around the edge of the image. Sigma's Super Multi-Layer Coating reduces flare and ghosting to help photographers produce sharp and high contrast images even in backlit conditions. The Hyper Sonic Motor (HSM) ensures silent, high-speed autofocusing, while the optimized AF algorithm helps realize even smoother AF performance. The 9-blade rounded diaphragm creates an attractive blur in the out-of-focus areas of the image.

NOTE: Nikon versions do not have an aperture ring. Some functions may not work depending on the camera. This lens is incompatible with film SLRs with the exception of the Nikon F6.

Key Features:

Delivers high-level artistic quality:
Designed with a focus on sophisticated optical performance and abundant expressive power, Sigma's Art line of lenses delivers high-level artistic expression. Developed with the maximum emphasis on artistic touch, they are designed to meet the expectations of users who value a creative, dramatic outcome above compactness and multifunction. Ideal for studio photography, they offer just as much expressive scope when capturing architecture, starry skies, portraits and many other scenes.

Advanced technologies make possible a 20mm f/1.4 lens:
To offer an ultra-wide-angle 20mm focal length and f/1.4 brightness at wide-open aperture, this lens incorporates a large double aspherical lens 59mm in diameter. Lenses of this type had been considered extremely difficult to manufacture, but Sigma took on the challenge to realize an f/1.4 ultra-wide-angle lens that fulfills the strict performance requirements of the Sigma Art line. What made this breakthrough possible were Sigma's advanced manufacturing technologies, which the company has developed over time by producing a wide range of ultra-wide-angle and large-aperture lenses. In turn, these advances made possible the Sigma 20mm f/1.4 DG HSM Art. Moreover, Sigma's advanced optical design minimizes distortion, transverse chromatic aberration, sagittal coma flare, and the reduction of brightness toward the edges of the image. Delivering top performance even at wide-open aperture, this lens can be considered the culmination of Sigma's Art line.

Minimized chromatic aberrations:
This lens minimizes chromatic aberrations, a common issue in large-aperture ultra-wide-angle lenses. It features two FLD ("F" Low Dispersion) glass and five SLD (Special Low Dispersion) glass elements to minimize transverse chromatic aberration, which is mainly visible around the edge of the image. The optimized lens power distribution helps minimize axial chromatic aberration. As a result, this lens delivers high image quality in every situation without color smearing, and its rendering performance is consistently sharp with high contrast.

Minimized distortion:
Distortion is a common issue in wide-angle lenses, and it is not possible to correct it simply by changing the aperture value. For this reason, a lens must be designed from the start to minimize this issue. By adjusting the incidence angle of light starting with the first lens element and incorporating optimally positioned aspherical glass elements, the Sigma 20mm f/1.4 DG HSM Art lens minimizes distortion throughout the entire image.

Exclusive low-dispersion glass:
The degree to which light is refracted by glass depends on the light's wavelength. This fact causes different colors of light to focus at slightly different points. The result is chromatic aberration, the color fringing that is particularly noticeable in telephoto lenses. Most chromatic aberration can be removed by combining a high-refractivity convex lens element with a low-refractivity concave element. Yet residual chromatic aberration known as "secondary spectrum" may still remain. To minimize this secondary spectrum, which can be a serious issue with conventional lenses, Sigma lenses feature up to three types of exclusive low-dispersion glass offering superior performance: ELD (Extraordinary Low Dispersion), SLD (Special Low Dispersion) and FLD ("F" Low Dispersion). In particular, FLD glass offers ultra-low dispersion in combination with high transmittance and the anomalous dispersion characteristics of fluorite. Meticulous deployment of these types of exclusive low-dispersion glass and optimization of power distribution gives Sigma lenses superlative image rendition undiminished by residual chromatic aberration.

Flare and ghosting reduction:
From an early stage in the lens design process, flare and ghosting have been measured to establish an optical design resistant to strong incident light sources such as backlighting. Sigma's Super Multi-Layer Coating reduces flare and ghosting to help photographers produce sharp and high contrast images even in backlit conditions. The included lens hood can be attached to block out extraneous light, which can have a negative effect on rendering performance.

Without Coating

With Coating

Top-level performance for the ultra-high-megapixel era:
Since the Sigma 20mm f/1.4 DG HSM Art provides the benefits of an ultra-wide angle lens with minimal distortion, it is ideal for photographing landscapes, starry skies, and architecture. In addition to capturing wide-angle shots with the whole scene in focus, the photographer can leverage wide-open aperture to take snapshots with the subject in focus and the background blurred with an attractive bokeh effect. Designed for ultra-high-megapixel digital cameras, this high-performance lens delivers outstanding resolution and high-clarity image quality even at wide-open aperture.

A refined, integrated design made with the photographer in mind:
In Sigma's new product lines, the lens caps and AF/MF switches are designed to improve usability. To ensure precise operation, internal parts feature generous use of metal and Thermally Stable Composite (TSC), which is highly compatible with metal parts. The lens barrel is engraved with the year of release for instant access to this information.

Note: TSC offers thermal expansion characteristics similar to those of aluminum. Parts made with TSC deform less, making lens construction of extremely high precision possible. As compared to polycarbonate containing 20% glass, a commonly used material, TSC offers approximately 70% higher elasticity. As compared to polycarbonate containing 30% glass, it offers 25% higher elasticity. (comparison is between Sigma-produced components.)

Hyper Sonic Motor ensures high AF speed:
The Hyper Sonic Motor (HSM) ensures silent, high-speed autofocusing, while the optimized AF algorithm helps realize even smoother AF performance. At any time during AF, users may access MF simply by rotating the focus ring. This feature makes faster focus adjustment possible, since there is no need to use the AF/MF focus mode switch. Also, the optional Sigma USB DOCK allows the user to set the lens to conventional full-time manual focus override.

Metal lens cap available (sold separately):
Matching the high-quality finish of the lens exterior, optionally available metal lens cap LC907-02 will go on sale simultaneously with the lens. Featuring materials identical to those of the lens barrel, this metal lens cap establishes a new level of unity within Sigma's new lens lines.

Rounded diaphragm:
The 9-blade rounded diaphragm creates an attractive blur in the out-of-focus areas of the image.

Brass made bayonet mount:
This lens incorporates a brass made bayonet mount which has both high accuracy and durability. A special treatment to reinforce its strength is applied to the surface giving it greater strength and making it highly resistant to long-term use.

"Made in Japan":
All Sigma's manufacturing processes -- right down to molds and parts, with a few exceptions -- are carried out under a single integrated production system entirely in Japan.

Evaluation with Sigma's own MTF measuring system "A1":
Sigma used to measure lens performance with MTF measuring system using conventional sensors. However, they have now developed a proprietary MTF (modulation transfer function) measuring system (A1) using 46-megapixel Foveon direct image sensors. Even previously undetectable high-frequency details are now within the scope of quality control inspections. This lens will be checked using this "A1" method before it is shipped.

Newly developed "USB DOCK" exclusively for new product lines:
Based on these new lines, Sigma has developed special software (SIGMA Optimization Pro) that can update the lens firmware and adjust parameters such as focus.

Applicable for the Mount Conversion Service:
As an experienced lens manufacturer that has been creating a diverse range of interchangeable lenses, Sigma offers a "Mount Conversion Service". With this paid service, the mount of your current SIGMA lenses can be changed to another mount of your choice. It gives a new life to your favorite lenses when you wish to use it on a different camera body.

ITEM INCLUDES

Sigma USB Dock (for Nikon Lenses) with:

1 Year Sigma USA Warranty

Sigma USB Dock (for Nikon Lenses)

Easily stay updated on the latest firmware.

The Sigma USB Dock works in conjunction with Sigma Optimization Pro software in order to connect a photographer's lens to their computer to update firmware, calibrate the lens and other customizations such as the focus parameter.

For the Sports category, changes can be made to: Autofocus speed, focus limiters, manual focus override and optical stabilization functionality. Updating the firmware can be done via the internet. Sigma Photo Pro is available for Mac and PC computers.

The Vivitar SLING1 Padded Neoprene Sling Camera Strap is designed to provide rapid access to your digital camera, camcorder or binoculars while keeping it safe. The SLING1 offers excellent on-the-go mobility with a mechanism that allows the camera to slide diagonally up and down the shoulder strap.

It has a 1/4"-20 threaded fastener that utilizes the camera's tripod socket so that the camera hangs upside down for a smooth grip, a neoprene shoulder pad that effectively distributes weight for less burden, and an under-arm tether that holds the strap securely in place.

FULLY ADJUSTABLE PADDED STRAP

1/4"-20 THREADED FASTENER

Key Features:

Designed for the active photographer

Worn diagonally across the torso

Fully adjustable padded strap

1/4"-20 threaded fastener with soft pad

Under-arm tether holds shoulder pad in place

Have both hands free

Material: Nylon and Neoprene

Length: 60 in. (152cm)

Weight: 5.6 oz. (159g)

ITEM INCLUDES

Precision Design 6-Piece Camera & Lens Cleaning Kit with:

Hurricane Air Blower

Lens Cleaning Tissues

Microfiber Cleaning Cloth

Lens Cleaning Liquid

Soft Brush

Cotton Swabs

1 Year Precision Design USA Warranty

Precision Design 6-Piece Lens & Digital SLR Cleaning Kit

Essential items for the proper maintenance of your equipment.

It's obvious that the cleaner the lens and camera sensor, the sharper your pictures will be. Dirt, dust, and fingerprints will degrade the image quality of even the finest optics. However, it's equally important to avoid using incorrect cleaning materials which can permanently damage your photo equipment.

This Color Diffuser Filter Set provides a selection of plastic diffusion and color correction caps for use with DSLR pop-up flashes. It includes a soft white diffuser that will soften the light from the built-in flash, a 1/2 warming diffuser that will warm the light, and a 1/2 cooling diffuser that will cool the light.

This diffuser set easily mounts on the hot shoe slot of most cameras with a pop-up flash, greatly softening the quality of light. It's great for portraits, candids and close-ups. The height of each diffuser is adjustable -- its twin prongs fit into any of the ten sets of holes at the rear of the diffuser -- for a perfect fit with almost any camera model.

This package contains 3 Universal LCD Screen Protectors that can be easily cut to size, attached and removed. Each piece protects your LCD screen from scratches and wear, and reduces glare for enhanced viewing. A squeegee card is also included to make application even easier, and to reduce air bubbles. These screen protectors can be used on a variety of electronic devices including digital cameras, camcorders, cell phones, handheld video games, and more.

Key Features:

Prevents scratches and wear

Reduces glare

Helps to maintain LCD and product warranty

Can be trimmed to fit any size LCD screen (up to 5 inches diagonally)

ITEM INCLUDES

CapKeeper 2 with:

1 Year Manufacturer USA Warranty

CapKeeper 2 Lens Cap Strap

Never lose your cap again!

The CapKeeper 2 is an elastic loop that wraps around barrel of your lens with an elastic lens cap leash. It prevents lens cap loss with an adhesive-backed disc that securely attaches to the lens cap.

The CapKeeper 2 is designed for SLR cameras with interchangeable lenses and video cameras.